U.S. News and World Report: Global climate change could have a profound impact on the migration pattern of the monarch butterfly, according to a new study. These butterflies, which fly 2,000 miles south from North America to the mountains of Mexico every fall and back again in the spring, would simply keep flying south if they didn't feel chilly winter weather, researchers found. The study was published Feb. 21 in the journal Current Biology. "The monarchs need the thermal microenvironment at the overwintering sites...
URL: http://health.usnews.com/health-news/news/articles/2013/02/21/climate-change-could-affect-monarch-butterflys-migration-study-says
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